Keestrack offers today the most versatile range of hybrid and plug-in solutions in mobile processing technology for quarrying and recycling applications. This applies to the complete product range, from screening plants and stockpile conveyors to mobile track-mounted crushing solutions of all relevant technologies and for all production capacities.
Recognize and use benefits
As one of the first manufacturers Keestrack recognized the huge saving potentials and operational advantages of electric drives for highly flexible track-mounted mobile processing solutions with transport weights up to 60 tons. In 2012 the first diesel-electric classifier was introduced, followed in 2013 by the first hybrid scalper and the first hybrid Keestrack crushers with electrified conveyors, followed by electric crusher drives. In these plants, powerful generators ensure low engine speed resulting in fuel-saving operations of the onboard diesels. Downstream screening plants or stockpile conveyors can now be fed via external plug-out supplies, which further improves the total fuel consumption of production trains.
With the plug-in option, to connect to the mains, the Keestrack hybrid "e"-versions further enlarged their operating cost advantage over conventional diesel-hydraulic systems. Installed electrical pumps for essential hydraulic consumers (lifting cylinders, track drive, etc.) allow the full-electric operation of today's "e"-versions. Compared to conventional diesel-hydraulic systems, energy costs can be reduced up to 80% - the noise levels during emission-free plug-in operation by about 30% according to Keestrack. Replacing hydraulic drives on conveyors, screen shafts, compressors or water pumps by electric motors also avoid long oil piping with leak-prone hose connections. Thermal problems in operations under extreme conditions are eliminated. With significantly lower oil quantities and extended change intervals the smaller hydraulic systems of Keestrack's "e"-versions not only save the environment but also real money.
In full-electric operation, this also applies to lubricants, filters and other wear parts of the onboard diesel. Less engine hours mean less maintenance and downtime, which has a positive impact on total cost of ownership, as well as the higher value retention. And finally: engine problems on a diesel-hydraulic crusher can stop the whole production or job-site, with a plug-in hybrid machine, a total breakdown can be relatively easy avoided by providing an additional external gen-set to ensure the finalization of the project.